Fixed-fee delivery only works if the fee is based on something real. That's what the scoping sprint is for, before either side commits to the build.
A fixed fee quoted from a one-page brief is a guess wearing a number. Before we commit to a delivery timeline or a team, we spend two weeks producing the artifacts that make the estimate real: a system design, a risk register, and a staffing plan.
The system design covers the architecture decisions that are expensive to reverse later — data model, integration boundaries, deployment topology. The risk register names the things most likely to blow the timeline, before they do. The staffing plan says exactly who's on the engagement and for how long.
If the scoping sprint surfaces something that changes the shape of the project, we say so — before a fixed fee locks either of us into the wrong plan. The scoping fee applies to the engagement if we proceed, so there's no throwaway cost to doing this properly.
Give the sprint a fixed output, not a fixed process: a one-page system design, a risk register with a Likelihood / Impact / Mitigation column for each risk, and a staffing plan naming roles and weeks. If any of those three is missing at the end of two weeks, the sprint isn't done — regardless of the calendar.
A fixed fee is only as good as the scoping that produced it. Two weeks of deliberate investigation beats two months of surprises.
Tell us about your system. We respond within one business day with whether we're the right studio for it — and a rough path forward.